290 



ME. B, F. CUMMINGS ON LICE 



females, as in all the specimens the head had assumed, even in 

 Stage I., the definitive female form. Both the head and the 

 thorax, not only in form but in chfetotaxy, are practically 

 identical with the adult female, even in the earliest stage in the 

 collection, which will probably prove to be Stage I. I have also 

 made one or two dissections of the larval mouth-parts and 

 can discover no characters in which they differ materially from 

 those of the adults. The larval abdomen, however, requires 

 separate treatment. 



Text-figure 21. 



Goitiodes bicuspidatus. Larva. Stage I. X 49. 



Stage I. (text-fig. 21). External Form. — Abdomen : Small Avith 

 an even margin, devoid of all sclerites. Chcetotaxy : The arrange- 

 ment of bristles cannot be safely described from one specimen, 

 and that given in the figure must be regarded as approximate 



